Kei Koga is Associate Professor at the Public Policy and Global Affairs Programme, School of Social Sciences, Nanyang Technological University (NTU). Concurrently, he is a Nonresident Fellow at The National Bureau of Asia Research (NBR), the United States, and a member of RIPS Research Committee, the Research Institute for Peace and Security (RIPS), Japan. His research focuses on International Security, International/Regional Institutions (particularly ASEAN), and East Asian/Indo-Pacific security.

Previously, he was Japan Scholar at the Wilson Center in 2022; visiting fellow at Center for Strategic and International Studies (CSIS) in 2017; a Japan-U.S. Partnership Fellow at the Research Institute for Peace and Security (RIPS), Tokyo, in 2012-2014; Postdoctoral Fellow in the International Studies Program, The Belfer Center for Science and International Affairs, Harvard Kennedy School, in 2012-2013; a Vasey Fellow at the Pacific Forum CSIS in 2009–2010; and RSIS-MacArthur visiting associate fellow at S. Rajaratnam School of International Studies (RSIS), NTU in 2010. He received his Ph.D. in International Relations at the Fletcher School of Law and Diplomacy, Tufts University.